vscode does not run eslint on .svelte files

[leon]

Describe the bug

Using vscode, the svelte rules are not getting run on .svelte files when navigating around in the code base.

It is because vscodes eslint plugin does not check .svelte files.

to get it working you need to explicitly tell vscode to also check .svelte files by adding

// .vscode/settings.json

// by adding "svelte" to this list it starts working
// not sure if we can append instead of redefining.
"eslint.validate": [
  "javascript",
  "typescript",
  "markdown",
  "svelte"
],

Don't know if the above is the best solve.
but if so the .vscode/settings.json should be added to the sv create template.

Reproduction

using sv to create a new project, and the add a new component with an #each block in it without the (mything.id) key

using vscode this should warn about you not having a key.
if I run

pnpm check

it will report that the key is missing.

Logs

System Info

System:
    OS: macOS 15.5
    CPU: (12) arm64 Apple M2 Max
    Memory: 105.02 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.16.0 - ~/.nvm/versions/node/v22.16.0/bin/node
    npm: 10.9.2 - ~/.nvm/versions/node/v22.16.0/bin/npm
    pnpm: 10.12.4 - ~/.nvm/versions/node/v22.16.0/bin/pnpm
    bun: 1.2.5 - ~/.bun/bin/bun
  Browsers:
    Chrome: 137.0.7151.120
    Edge: 138.0.3351.55
    Safari: 18.5
    Safari Technology Preview: 26.0
  npmPackages:
    svelte: ^5.0.0 => 5.34.8

Severity

annoyance

[manuel3108]

@baseballyama do you have an opinion on that? I wonder if the only way to tell that to eslint would be the vscode specific settings file. Is there potentially another way?

[baseballyama]

I think the only way is to add settings to .vscode/settings.json.
It would be nice if the ESLint VSCode extension could read eslint.config.js and notify us of any obviously missing file extensions.😅

How about generating a .vscode/settings.json as well when VSCode is selected as the editor in sv create command?

(Note: This is already mentioned in the eslint-plugin-svelte README.)
https://github.com/sveltejs/eslint-plugin-svelte?tab=readme-ov-file#editor-integrations